 A simplified approach was developed to explore nutrient deliveries to coastal zones, identify the main determinants of eutrophication, and develop a comprehensive concept of systemic processes responsible for river and coastal water degradation, leading to a land-to-sea continuum view and promoting interdisciplinary dialogue among scientific communities. This would help actors in multiple sectors and policy makers make harmonized choices for a sustainable environment through an economically and socially viable way of life. This article was authored by Josette Garnier, Jill Billan, Louis Lasalleta, and others.